Cygolite TridenX LED 750 Li-Ion Triple H.B. LED System with 5 Hr Li-Ion Battery Triple LED bike light with frame-mounted lithium-ion battery uses State-of-the- Art Cree XPG LED Technology for 750 lumens of LED light output On-Site Programmable (OSP) Technology - Program your preferred brightness settings directly to the light with the push of the button Cross-Fire technology crosses beams to maximuize beam width and depth for optimum riding visibility Runs for up to 5 hours on high setting and up to 24 on low Handlebar and helmet mounts included